We're retired. I do a quarterly "financial assets" statement for my wife.
When I first retired, I did before tax numbers because they matched the mutual fund and bank statements. Like others, I figured my annual spending plan included taxes, so that made sense.
Since then, we've had some relatives with serious financial trouble and we (esp my wife) have helped them out. Since that means unplanned withdrawals, I became very aware of the impact of taxes. It was discouraging.
Note that we get the same effect for any, large, unscheduled expense. For example, I like to pay cash for cars. A $35k car means an unscheduled withdrawal of $50k.
So, I've switched to two columns. One before tax, the other net of taxes at our marginal rate. Yes, the second is somewhat conservative, but I think it's time to be more realistic in our spending, and this may help.